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DTH Hammers – Built for Demanding Rock Formations

Trimach’s DTH hammers are engineered for demanding rock formations and professional drilling operations, where endurance and drilling efficiency decide the pace of the project. A heavy piston delivers strong impact energy, while optimized airflow ensures low air consumption and steady penetration through the hardest ground. These hammers keep your operation moving — meter after meter.

  • Lower Operating Costs
  • Minimal Downtime
  • Universal Compatibility
SOITA MEILLE
LAITA SÄHKÖPOSTIA
LATAA TUOTEKATALOGI

Key Advantages of Trimach Down the Hole Hammers

  • Endurance & Long Lifetime – Built for extreme rock formations and continuous drilling operations.
  • Optimized Airflow Efficiency – Lower air consumption means drill with less comperessor, reduced fuel costs and higher drilling efficiency.
  • Heavy Piston Impact Power – Delivers strong impact energy for faster penetration and better rock breaking.
  • Lightweight Construction and optimized design – Easier handling on drill rigs without compromising impact performance.
  • Service-Friendly Design – Quick maintenance and minimal downtime in demanding field conditions.
  • Consistent Energy Transfer – Precision-machined components ensure smooth and reliable performance meter after meter.

DTH hammers are most used in hard rock formations and are designed to tackle complex tasks like drilling in populated areas without putting existing structures at risk.

How a DTH Hammer Works ?

A DTH hammer is the core power unit in down-the-hole drilling operations, converting compressed air into pure impact energy. Positioned just above the drill bit at the end of the drill string, the hammer strikes directly behind the bit — minimizing energy loss and maximizing drilling efficiency in hard rock formations.

The operation of a DTH hammer involves three actions: percussion, rotation, and flushing. During operation, compressed air flows through the hammer body, driving a piston that delivers high-frequency blows to the bit. Each strike fractures the rock, while the same air stream, that drives the piston flushes the cuttings upward through the hole, keeping the bore clean and maintaining penetration speed.

Trimach’s DTH hammers are engineered for compatibility with all major drill rigs, drill bits, and DTH drilling tools — designed for both foundation and deep hole drilling in mining, construction, geothermal, and water well projects. Optimized airflow and precision machining ensure efficient energy transfer, reduced air consumption, and consistent performance meter after meter.

Product range – Standard Technical Dimensions

Specifications Table
PRODUCT CODE BIT RANGE AIR PRESSURE (at compressor) HAMMER DIMENSIONS TOP SUB
Outer Ø (mm) Shank Pressure (bar) Air volume (m3/min) Outer Ø (mm) Length (mm) Paino (kg)
MK-480 (48″) 1219,2-1524 MK 480 13,8 127,4 906 2413 6740 HEX PIN
17,2 158,6
20,6 184,1
MK-360 (36″) 914,4-1244,6 MK360 13,8 115,8 758 2232 5011 HEX PIN
17,2 148,1
20,6 169,9
MK-240 (24″) 609,6-1016 N240 13,8 86,7 533 2394 2936 8-5/8″ API REG BOX / Beco 10″ Box /
HEX PIN
17,2 99,1
20,6 114,1 114,1
MK-180 (18″) 457,2-813 N180 / SD18 13,8 59,1 412 2175 1663 8-5/8″ API REG PIN / HEX PIN
17,2 73,7
20,6 88,0
MK-140 (14″) 355,6-508 N125 13,8 39,7 320 1928 924 6-5/8″ API REG PIN / HEX PIN
17,2 52,1
20,6 65,7
MK-120 (12″) 301,6-482,6 N120 / DHD112 / SD12 13,8 36,3 272 1957 655 6-5/8″ API REG PIN
17,2 49,0
20,6 60,9
Hi-MK-100 (10″) 254-406 SD10 / N100 13,8 33,4 225 1273 292 6-5/8″ API REG PIN
17,2 52,1
20,6 65,7
Hi-MK-080 (8″) 180-324 DHD380 / SD8 13,8 24,1 185 1167 201 4-1/2″ API REG PIN
17,2 31,4
20,6 37,1
MK-060 (6″) 155-190 DHD360 13,8 16,1 148 1171 110 3-1/2″ API REG PIN
17,2 20,2
20,6 24,2
MK-050 (5″) 135-155 DHD350 13,8 13,6 126 1134 79 3-1/2″ API REG PIN
17,2 17,0
20,6 20,4
MK-040 (4″) 110-130 DHD340 13,8 8,2 99 961 43 2-3/8″ API REG PIN
17,2 10,3
20,6 12,4
MK-035 (3,5″) 90-115 DHD3,5 13,8 6,5 82 857 25 2-3/8″ API REG PIN
17,2 8,2
20,6 9,9

Need Customized DTH Hammers?

Every drilling setup is unique — and so are your requirements. Trimach offers custom-built DTH hammers from 3″ to 48″, designed to match your specific drill rigs, joint types, and drilling operations.

Choose from the most common backhead connections (HEX, API, BECO) or request a custom shank to fit your specific drill string and rig.

Optional shock absorbers and adapters can also be tailored for your hammer system to improve drilling efficiency and reduce vibration.

Our priority is simple: cost-effective customization, fast spare part delivery, and tools built to perform in your conditions.

Drilling Costs with Trimach’s DTH Hammers

Efficient drilling starts with the right hammer. Trimach’s DTH hammers are engineered for low air consumption, allowing them to operate effectively with less compressed air than conventional designs. This directly translates to significant fuel savings in compressor operation — reducing both operating costs and carbon footprint per drilled meter.

Our hammers maximize drilling efficiency by extending tool life and keeping maintenance intervals longer. The optimized drilling process allows you to drill deeper with fewer interruptions, saving fuel, compressor load, and overall drilling cost per meter. Precision engineering and balanced airflow mean every strike transfers full impact energy to the rock — ensuring that more power goes into progress, not losses.

Applications of Trimach DTH Hammers

Foundation and Construction Drilling

Trimach DTH hammers deliver precise hole alignment and efficient energy transfer in demanding foundation projects. Their optimized airflow and consistent impact power make them ideal for piling, anchoring, and micro-pile drilling operations in urban sites.

DTH hammers are most used in hard rock formations and are designed to tackle complex tasks like drilling in populated areas without putting existing structures at risk.

Mining and Quarrying

In hard rock mining and quarry applications, Trimach hammers maintain high penetration rates and reliability under extreme impact loads. The heavy piston design and heat-treated components ensure long service life with minimal downtime.

Geothermal and Energy Projects

For deep hole drilling in geothermal and energy applications, Trimach hammers offer stable performance and low air consumption. Efficient energy transfer and precision machining keep the hammer operating smoothly even at high depth and pressure.

Water Well Drilling

Trimach DTH hammers are trusted in water well drilling for their balance of speed, endurance, and low fuel use. The optimized drilling process allows drillers to drill deeper while maintaining consistent borehole quality and efficiency.

Sustainable energy

Trimach DTH hammers are trusted in water well drilling for their balance of speed, endurance, and low fuel use. The optimized drilling process allows drillers to drill deeper while maintaining consistent borehole quality and efficiency.

Why Choose Trimach DTH Hammers — The Number One Tool for Drillers

Superior Manufacturing, Materials and Quality Control

Trimach’s DTH hammers are built with precision and endurance in mind. Every hammer is CNC-machined, heat-treated, and tested under real drilling operations to ensure maximum performance and reliability in the field.Quality testing ensures that drilling products stand up to rigid standards.

High-strength alloys, tight tolerances, and strict manufacturing process guarantee consistent impact power and efficient air consumption — no matter the depth or formation.

Behind every hammer is a team of experts committed to delivering quality and long-term value. Our technical services include consultation on hammer selection, pressure optimization, and full support throughout your project lifecycle. 

Expert support is available to assist in designing the right drilling solution. With decades of combined expertise, we help our customers achieve safer, more efficient, and lower-cost drilling — backed by equipment that’s proven to last.

Areas We Serve

We serve rig operators, site and project managers and drilling contractors across Finland, Sweden, Norway, Denmark, Switzerland, Germany, Austria, the United Kingdom, Italy, Iceland, Poland, Estonia, Latvia, and Lithuania, providing fast delivery, technical support, and customized DTH solutions for Northern and Central European ground conditions.

FAQ: DTH Hammers

The best hammer for your job depends on the ground conditions, borehole diameter, and compressor capacity. Trimach’s technical team helps you match hammer size, shank type, and working pressure to your rig setup — ensuring the right balance between penetration rate, fuel efficiency, and lifetime performance.

The shank defines how the bit connects to the hammer. Each type has unique splines, diameters, and lengths. Send us a photo and two key measurements, and we’ll identify the correct shank instantly. The hammer and bit must share the same shank for full impact energy transfer.

Yes. Trimach hammers are designed to fit all standard DTH drilling rigs and compressor systems. Whether you’re using API, HEX, or BECO connections, we can match the correct backhead or adapter so you can integrate our hammers without modifying your rig.

High-pressure hammers (17–21 bar) deliver greater impact energy and faster penetration in hard rock formations. Standard-pressure models (10–14 bar) are more economical for medium-depth or softer formations. Our team can help you determine the optimal pressure range for your compressor and project depth.

Many Trimach hammers stay operational for over a decade when maintained correctly. Built from heat-treated alloy steel and machined with tight tolerances, they resist wear even under continuous impact in the toughest granite and quartzite formations.

Regular maintenance extends hammer life and keeps performance consistent. Before drilling, ensure that all threaded connections are tight. After work, if the hammer will be stored for an extended period, lubricate the hammer internals thoroughly to prevent corrosion and seizing. We provide service manuals, on-site maintenance tips, and training when required.

Yes — Trimach keeps a full stock of wear parts and service kits for all common hammer sizes. We offer fast shipping and technical support across Finland, Sweden, Norway, the Baltics, and the UK to minimize downtime and keep your operation drilling.

Absolutely. We manufacture backheads compatible with HEX, API, and BECO joints. Custom adapters can be produced for non-standard rigs or casing systems, ensuring a perfect fit and easy integration into your drilling setup.

Yes. We offer optional shock absorbers to reduce vibration and prolong tool life, as well as custom adapters for special rig configurations. These upgrades improve drilling efficiency, operator comfort, and hammer stability.

Our technical team is always available to help you specify the right setup — from bit and hammer selection to air pressure and rig compatibility.
📧 matias.niemelainen@trimach.fi
📞 +358 40 589 2446

DTH stands for Down-The-Hole, a drilling method where the hammer operates at the bottom of the drill string — directly behind the bit. Because the impact energy is generated at the hole bottom, power loss through the drill rods is minimized, resulting in more efficient drilling and straighter holes even at greater depths.

A DTH hammer is a pneumatically powered impact tool that delivers percussive blows directly to the drill bit. It works at the bottom of the hole rather than at the surface, ensuring that nearly all impact energy is transferred into the rock. Compared to top-hammer systems, DTH technology offers superior penetration rates, better accuracy, and less energy loss in deep hole drilling.

Performance depends on several interacting factors: 1) Piston weight and stroke length – determine impact force and speed. 2)Hammer bore and air flow design – influence air pressure efficiency. 3)Total hammer weight – affects energy transfer stability. 4)Air consumption – impacts compressor size, fuel cost, and total drilling cost. Together, these parameters define the hammer’s overall productivity, fuel efficiency, and cost-effectiveness per meter drilled.

Selecting the correct hammer depends on your borehole diameter, ground formation, and air pressure capacity. You should also consider total drilling depth, compressor performance, and bit type. Trimach’s experts help match your hammer, shank, and bit setup for optimal performance in foundation, mining, and geothermal applications.

Yes. DTH hammers are designed specifically for hard rock formations such as granite, basalt, and quartzite. Because impact energy is produced at the bit face, the DTH system is the most effective method for deep hole drilling in extremely hard or fractured rock.

Absolutely. The DTH method is ideal for drilling through boulders, cobble layers, and mixed formations, where conventional rotary or auger systems would lose alignment or torque. The hammer’s percussive action breaks the rock into small chips, which are lifted out by compressed air.

Yes — DTH hammers are commonly used for casing advancement and piling applications. When paired with Trimach’s DTH Ring Bit Systems, they can drill through overburden and anchor casings directly into bedrock with excellent precision.
👉 Learn more here: DTH Ring Bit Systems

Yes. DTH hammer drilling achieves some of the highest penetration rates in hard rock environments. By delivering impact energy directly at the bit, DTH systems eliminate vibration loss and enable faster drilling than most other methods — saving both time and fuel on site.

The shank is the connection between the hammer and the drill bit. Each shank type has its own spline geometry, height, and diameter. The hammer and bit must have matching shanks to function correctly.
If you’re unsure, send us a photo and a few key dimensions — Trimach’s technical team will identify the correct shank immediately.

DTH (Down-the-Hole) drilling is a cutting-edge technique widely used in modern drilling operations across construction, mining, and water well drilling projects. This method utilizes a DTH hammer, a specialized tool that delivers powerful percussive blows directly to the drill bit at the bottom of the hole. By generating impact energy right where it’s needed, DTH drilling maximizes drilling efficiency and achieves superior penetration rates, especially in hard rock formations.

One of the key advantages of DTH drilling is its ability to drill deeper and create larger diameter holes with minimal energy loss. The use of compressed air not only powers the hammer but also efficiently removes cuttings from the hole, keeping the drilling process smooth and productive. This results in lower air consumption, reduced fuel costs, and overall improved drilling performance.

DTH drilling is particularly valued in deep hole drilling applications, where maintaining straight, precise holes is critical. Its effectiveness in hard rock makes it the preferred choice for challenging environments, such as mining exploration, foundation work, and water well drilling. With the right combination of DTH hammer and drill bit, operators can optimize their drilling operations, boost productivity, and significantly reduce project costs—delivering reliable results for even the most demanding jobs.

DTH drilling offers several environmental advantages compared to traditional drilling methods, making it a responsible choice for projects where minimizing impact is a priority. The down-the-hole approach generates less surface vibration and noise, which is especially important in urban construction sites or sensitive natural environments. This reduces the risk of disturbing nearby structures, wildlife, or communities.

The efficient use of compressed air in DTH hammers not only lowers energy consumption but also helps control dust and debris during drilling. Many modern DTH systems are designed to optimize airflow and minimize waste, further reducing the environmental footprint of drilling operations. Additionally, the precision and speed of DTH drilling mean less time spent on site, resulting in lower fuel consumption and reduced emissions.

Tri-Mach supports sustainable operations by using Naturmate DTH Hammer Oil, a biodegradable and non-toxic lubricant that protects equipment while minimizing environmental harm. This ensures that drilling performance remains high without compromising ecological safety.

One of the key advantages of DTH drilling is its ability to drill deeper and create larger diameter holes with minimal energy loss. The use of compressed air not only powers the hammer but also efficiently removes cuttings from the hole, keeping the drilling process smooth and productive. This results in lower air consumption, reduced fuel costs, and overall improved drilling performance.

DTH drilling is particularly valued in deep hole drilling applications, where maintaining straight, precise holes is critical. Its effectiveness in hard rock makes it the preferred choice for challenging environments, such as mining exploration, foundation work, and water well drilling. With the right combination of DTH hammer and drill bit, operators can optimize their drilling operations, boost productivity, and significantly reduce project costs—delivering reliable results for even the most demanding jobs.

Related Products

  • DTH Ring Bit Systems 
  • Casing Advancement 
  • Iskunvaimentimet 
  • DTH Drill Rods (API) 
  • DTH Drill Rods (HEX) 
  • NatureMate

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Matias Niemeläinen

matias.niemelainen@trimach.fi
+358405892446

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